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Evolution
Classification of organisms
Life begins
Microbes
Animals
100
the scientist who first proposed an explanation for why evolution occurred
Who is Charles Darwin?
100
traditionally, organisms are classified by these
What are visible (physical) characteristics?
100
Earth's early atmosphere likely lacked this crucial gas
What is oxygen?
100
cell division for prokaryotes
What is binary fission?
100
Jellyfish exhibit this type of symmetry
What is radial symmetry?
200
Darwin described this as "descent with modification"
What is evolution?
200
The highest, most inclusive category we use today to classify organisms
What is domain?
200
These molecules formed spontaneously in the sea of early Earth and are the building blocks of cells
What are macromolecules?
200
This microbe is not alive
What is virus?
200
Arthropods have an exoskeleton composed of this protein
What is chitin?
300
Darwin noted that individuals that are better suited to their environment are more likely to survive and produce offspring
What is natural selection?
300
This branching tree represents the evolutionary relationships among a number of species
What is a cladogram?
300
This type of cell was likely the first to form on earth
What is prokaryotic?
300
The process by which some bacteria pass DNA from one cell to another
What is conjugation?
300
Round worms and arthropods shed their exoskeleton to grow in this process
What is ecdysis (or molting)?
400
Darwin observed these organisms when developing his theory of evolution.
What are finches?
400
This type of cell contains no membrane bound organelles
What is prokaryotic?
400
The first vertebrates to invade land
What are amphibians?
400
Organisms that can only obtain their energy from organic molecules synthesized by other organisms
What are heterotrophs?
400
These animals were the very first vertebrates
What are jawless fishes?
500
a change in DNA sequence; the ultimate source of variation
What is mutation?
500
The most specific, least inclusive level of our current classification scheme
What is species?
500
The theory that mitochondria and chloroplasts were formed by entering an early eukaryotic cell
What is the endosymbiotic theory?
500
Under harsh environmental conditions, some bacteria are able to form these thick walled structures to protect them for centuries!
What are endospores?
500
Individuals that contain both male and female reproductive organs
What is a hermaphrodite?